<template>
  <div class="reports">
    <!-- 1.面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 为 ECharts 准备一个具备大小（宽高）的 DOM -->
      <div id="main" ref="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
// 定义echarts
import echarts from "echarts";
// 定义lodash
import _ from "lodash";
export default {
  data() {
    return {};
  },
  async mounted() {
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(this.$refs.main);
    // 获取图表的配置项和数据
    let { data: res } = await this.$http.get("reports/type/1");
    if (res.meta.status !== 200) return this.$message.error("获取图表数据失败");
    // console.log(res);
    // 需要合并的数据对象
    const options = {
      title: {
        text: "用户来源"
      },
      tooltip: {
        trigger: "axis",
        axisPointer: {
          type: "cross",
          label: {
            backgroundColor: "#E9EEF3"
          }
        }
      },
      grid: {
        left: "3%",
        right: "4%",
        bottom: "3%",
        containLabel: true
      },
      xAxis: [
        {
          boundaryGap: false
        }
      ],
      yAxis: [
        {
          type: "value"
        }
      ]
    };
    // 使用 lodash 的 merge 合并数据对象
    const result = _.merge(res.data, options);
    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(result);
  },
  methods: {}
};
</script>

<style lang="less" scoped>
.el-card {
  margin-top: 15px;
}
</style>
